The outer boundary of a human cell is the

Answers

Answer 1
Cell membrane (remember animals don't have cell walls)

Related Questions

Describe the type of gaseous molecules that are most susceptible to non ideal behavior

Answers

An ideal gas is a theoretical gas in which inter molecular forces do not exist among the molecules and the molecules do not occupy any space. A gas that does not obey ideal gas law are described as non ideal in behaviour. Gases that are most susceptible to non ideal behaviour are those that have attractive and repulsive forces among their molecules and whose particles have volume. Gases that exhibit non ideal behaviour has compressiblity factor ratio that deviate from 1.

Gaseous molecules that are most susceptible to non-ideal behavior are those with strong intermolecular forces and/or large molecular sizes.

Gaseous molecules that are most susceptible to non-ideal behavior typically exhibit strong intermolecular forces and/or have large molecular sizes. Non-ideal behavior is primarily observed in gases under high pressure and low temperature conditions, where deviations from the ideal gas law become significant.

1. Strong Intermolecular Forces: Molecules with strong intermolecular forces, such as hydrogen bonding, dipole-dipole interactions, or significant London dispersion forces, are more likely to exhibit non-ideal behavior. For example, polar molecules like water vapor (H₂O) and ammonia (NH₃) have strong hydrogen bonds that cause them to deviate from ideal gas behavior.

2. Large Molecular Size: Larger molecules with greater molar masses, such as sulfur hexafluoride (SF₆) or carbon dioxide (CO₂), are more susceptible to non-ideal behavior because their larger volumes lead to greater excluded volume effects. These molecules occupy more space and therefore do not follow the assumptions of the ideal gas law, which assumes negligible molecular volume.

3. High Pressure and Low Temperature: Under high pressure, the volume of the gas is reduced, and the intermolecular attractions become more significant. At low temperatures, the kinetic energy of the gas molecules decreases, making intermolecular forces more apparent.

In summary, gaseous molecules most susceptible to non-ideal behavior are those with strong intermolecular forces and/or large molecular sizes. This behavior is particularly pronounced under high-pressure and low-temperature conditions, where deviations from ideal gas assumptions become significant.

How much of the Earth’s water is usable as a freshwater resource?

Answers

How much of the Earth’s water is usable as a freshwater resource?

3%

3% is how much of Earth's water is usable as a freshwater resource.

What part of a vertebrate's brain is the center for thinking and complex behaviors? the spinal cord the medulla oblongata the optic lobe the cerebral cortex?

Answers

I believe the correct answer is the first option. The part of a vertebrate's brain that is the center for thinking and complex behaviors is the spinal cord. It is a system that is characteristic in vertebrates. It extends from the base of the brain though the spinal column. It has nerve fibers that are responsible for mediating reflex actions and the transmission of impulses to the brain and also from the brain. It is a part of the central nervous system that functions to supply nerves and in receiving the information from the PNS or the peripheral nervous system in the body.

The correct part of a vertebrate's brain that is the center for thinking and complex behaviors is the cerebral cortex.

The cerebral cortex is the outermost layer of the brain and is associated with higher brain functions such as thinking, perceiving, producing, and understanding language. It is divided into four lobes: the frontal lobe, the parietal lobe, the occipital lobe, and the temporal lobe. Each lobe has specific functions, but together they are responsible for the processing of sensory and motor information, as well as cognitive functions like memory, decision-making, and problem-solving.

In contrast, the spinal cord is part of the central nervous system and is primarily responsible for transmitting neural signals between the brain and the rest of the body. The medulla oblongata is a part of the brainstem and is involved in autonomic functions such as heart rate, breathing, and blood pressure. The optic lobe, also known as the optic tectum, is primarily involved in visual processing and is more prominent in non-mammalian vertebrates.

Therefore, when considering the center for thinking and complex behaviors, the cerebral cortex is the correct answer."

Which of these Earth spheres interact with oceans during beach erosion?

geosphere
hydrosphere
cryosphere
atmosphere

Answers

The Earth sphere that interact with oceans during beach erosion is the hydrosphere. Below the atmosphere is the hydrosphere. This is where all liquid forms are located. And since the seawater has a greater mass than air, it has the greatest pressure. The first layer of the atmosphere is the troposphere, is where we are able to do most of our activities. This is where we can see the formation of clouds, the production of rain, hail, snow and other weather phenomenon. Also, this layer is where the greatest amount of air pressure because most of the molecules of air are in this area. Like us, air has also mass and the pressure is brought down by the earth’s gravity causing an increase in weight exerted on you as you descend lower into the atmosphere. So, as you enter into the other layers of atmosphere above the troposphere, the air pressure starts to decrease. 

Answer:

Its not Hydrosphere

Explanation:

I took the test and got it wrong :(

Changes in the density of the white matter in the corpus callosum may also underlie the advances seen in _____ during late childhood.

Answers

Final answer:

The changes in the density of the white matter in the corpus callosum during late childhood may underlie advances in cognitive skills.

Explanation:

The changes in the density of the white matter in the corpus callosum during late childhood may underlie advances in cognitive skills. The corpus callosum is a structure that connects the two hemispheres of the brain and is responsible for communication between them. As the density of white matter increases in the corpus callosum, there is improved connectivity between brain regions, allowing for more efficient neural communication and information processing.

Over time, why does natural selection continue to work? A.) Environments are always changing B.) Animals are continually mating. C.) Organisms are always improving. D.) Genes are constantly mutating.

Answers

A
I would say because natural selection selects the traits that would help the organism survive in their environment.

Answer:

The correct answer would be A.) Environments are always changing.

Natural selection is one of the natural phenomenons which causes the evolution of the organisms.

By this phenomenon, the organisms which are better suited to the changing environment tend to survive and reproduce at a better rate as compared to the organisms which are less adaptive to the environment.

Natural selection mainly depends on the environment (such as temperature, pressure, color et cetera) and thus, it continues to work as the environment keeps on changing.

For example, the temperature and levels of oceans are increasing due to global warming, so, the marine organisms which are better adapted to the changing temperature, pressure, and salinity would survive and reproduce more.

Gram for gram, which provides the most energy? carbohydrates proteins alcohol fats

Answers

carbohydrates. they're what give you energy. 

Fats provides the most energy than the carbohydrate and protein.

Energy provided by fat, carbohydrate and protein

Fat provides 9 calories per gram.

Carbohydrate and protein both provides 4 calories per gram of it.

Hence, fats provides the most energy of all the macronutrients.

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Seed-bearing plants differ from all other plants in that

Answers

Their gametes do not require water for fertilization to occur. hope this helps

What do you think would happen to an animal cell that was placed into a drop of 100% pure water?

Answers

The cell would swell up and eventually burst. 

Which of the following is NOT a predator avoidance mechanism of schooling? A. increasing group awareness B. confusing the lateral line organ C. creating visual confusion D. producing pheromones

Answers

Final answer:

Producing pheromones is not a predator avoidance mechanism associated with schooling among fish. Schooling fish use tactile and visual signals to coordinate movements and rapidly respond to potential threats.

Explanation:

The predator avoidance mechanism among schooling fish that is NOT associated with schooling is producing pheromones. Schooling is a behavior where fish swim in coordinated patterns providing several advantages for predator avoidance, such as increasing group awareness, confusing the lateral line organ of predators, and creating visual confusion. Schooling fish mainly exchange information through tactile signals and visual signals to maintain their coordinated movement and to respond rapidly to predator threats. Pheromone signals are typically used to communicate information about things like reproductive status or territory, but not typically for the rapid response required for predator evasion in schooling fish.

In an example where animals of the same species exchange information in response to an approaching predator, one animal might detect the predator and send an alarm signal. This could be in the form of a sudden movement, body posture change, or an alarm call that others perceive. This triggers a cascade of responses within the group, where each individual reacts to the information, allowing for rapid collective evasion.

Final answer:

Producing pheromones is not a mechanism of predator avoidance used by schooling fish. Schooling fish use mechanisms like increasing group awareness, confusing predators' lateral line organs, and creating visual confusion to avoid predators. Pheromones are typically used for communication within species rather than for evading predators. Option D.

Explanation:

The correct answer is: Producing pheromones is NOT a predator avoidance mechanism of schooling.

Schooling fish use various mechanisms for predator avoidance, including:

Increasing group awareness: In a school, each fish benefits from the many eyes of the group, which helps in early predator detection.

Confusing the lateral line organ: This organ in predators detects changes in water movement. A mass of schooling fish can create complex water movements that confuse the predator's lateral line system.

Creating visual confusion: The mass movement of schooling fish can create a visual effect that makes it difficult for predators to single out an individual fish.

Pheromones, however, are chemical signals often used for communication between members of the same species, such as sounding an alarm or marking territory, but they are not typically a mechanism used by schooling fish to avoid predators.

In a scenario where animals exchange information in response to an approaching predator, a fish may release alarm substances that trigger a flight response in others. This is an example of pheromone signals inducing a direct biological change in behavior.

A strand of mrna has the bases guanine-adenine-cytosine. which amino acid corresponds to these bases

Answers

The codon guanine - adenine - cytosine will code for the the amino acid ASPARTIC ACID. The genetic code is represented as an RNA codon table because it is mRNA that direct protein synthesis which take place in the ribosome. 

Asp because of ASPARTIC ACID.

Single-celled organisms exchange gases directly across their ____________.

Answers

single celled organisms exchange gases directly across their Cell membrane.
Directly across their cell-membrane 

Which of the following is NOT a flatworm?

1.Flukes
2.TapeWorm
3.Planarian
4.None Of The Above

Answers

 are all flatworms so the answer is none of the above
I think the answer would be #1 Flukes

Because skeletal muscle contractions demand large quantities of atp, skeletal muscles have

Answers

Final answer:

Skeletal muscles demand large quantities of ATP for contraction and thus have a high concentration of mitochondria and blood vessels to support continuous ATP regeneration via creatine phosphate metabolism, anaerobic glycolysis, and aerobic respiration.

Explanation:

Skeletal muscles are composed of very hard working cells that require an abundance of adenosine triphosphate (ATP) to contract and function properly. Because skeletal muscle contractions demand large quantities of ATP, skeletal muscles contain a high concentration of mitochondria, which are the organelles responsible for ATP production in cellular respiration. Additionally, skeletal muscles are equipped with mechanisms to rapidly regenerate ATP through creatine phosphate metabolism, anaerobic glycolysis, and aerobic respiration.

Further ensuring efficient operation, skeletal muscle fibers are also well-supplied with blood vessels for nourishment and oxygen delivery, essential for aerobic respiration and ATP synthesis. The combination of numerous mitochondria and a strong vascular system supports the continuous regeneration of ATP required for muscle contractions, homeostasis maintenance, and heat generation during activities or shivering.

To avoid damaging important structures in the lower limbs of infants, intramuscular injections are administered into the

Answers

Intramuscular injections are administered into the VASTUS LATERALIS. Vastus lateralis muscle is located on the side of the thigh; the muscle is the largest of the group of muscles called quadriceps. Administering injection on this site in infants drastically lowers the risks of damaging important structures in infants. 

Athletes can safely add muscle tissue by:

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tripling protein intake. taking hormones duplicating those of puberty. putting a demand on muscles repeatedly

Athletes need to add muscles than fat. They can add muscles by putting a demand on muscles repeatedly by making them work harder.

Lift progressively heavier weights, eat a calorie surplus, get adequate rest, and the body will build larger, stronger muscles to cope with the ever-increasing loads.

Lifting progressive weights would lead to hypertrophy, which maximizes the muscle growth. Getting adequate rest would lead to repair of muscles damage.Eating a protein rich diet would help in building muscles in the body.

Therefore, athletes can work out, train their muscles and eat a protein rich diet to build muscle tissue in the body.

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Infants need fat because it aids in absorption of several vitamins and also helps the ______________ to develop.

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there growth and brain development better right?

Infants need fat because it aids in absorption of several vitamins and also helps the growth and brain to develop.

Why infants need fat?

Infants need fat as it aid in the absorption of the several vitamins. It also helps the brain or the nervous system just to develop them normally. Fats has insulate all the nervous system tissues in the body. Getting enough of this help infants feel full. It is also essential for growth and development.

Liver secretes bile which has been stored in the gall bladder. Bile enters the duodenum just via the bile duct. Bile emulsifies lipids and transforming the large lumps of the lipids into tiny droplets, which has been provide the larger surface area for the digestion. This has been allow the lipid digestion to the proceed more rapidly.

Bile has been contains bile acids, which are the critical for the digestion and the absorption of the fats and fat-soluble vitamins in the small intestine. Many waste products has been including bilirubin, are the eliminated from the body by the secretion just into the bile and elimination in feces.

Therefore, Infants need fat because it aids in absorption of several vitamins and also helps the growth and brain to develop.

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People with type o blood can be universal donors because their red blood cells do not contain either a antigen or b antigen on their surface.

Answers

This is  true.. so its the answer too... Whats the question??

Exertional heat stroke can disrupt organ function when the heat production continues to exceed the body's capacity to dissipate heat. coach can first recognize heat stroke by signs of:

Answers

Coach can first recognize heat stroke by increased in body temperature brought on by intense physical activity in hot weather. Exertional heat stroke is a medical emergency; the emergency medical service should be called for and while waiting for them, affected person should be moved into a cool place and all outer clothing materials should be removed from his body.

Final answer:

Heat stroke can be recognized by a coach through signs such as extreme confusion, seizures, and dry skin, which are indicative of the body's inability to regulate its temperature. Dehydration plays a critical role in heat stroke, and the condition can lead to long-term health effects. Immediate medical attention is required for someone experiencing heat stroke.

Explanation:

A coach can first recognize heat stroke by signs of central nervous system dysfunction such as extreme confusion, agitation, seizures, and possibly coma or death. Additionally, physical signs such as dry skin due to the absence of sweating, dizziness, trouble breathing, and rapid pulse can be present. These symptoms are serious and indicate that the body's temperature regulation systems have failed. Heat stroke is a life-threatening state where the body's core temperature exceeds 104°F (40°C) and can no longer effectively cool itself down.

Dehydration is a primary factor in heat stroke as it reduces the body's ability to sweat and cool down. When someone is exercising, especially in high temperatures and humidity, they are at risk of heat-related illnesses if they do not adequately hydrate. Continuous exercise could lead to progression from heat exhaustion to heat stroke, requiring immediate medical attention.

It is important to note that heat stroke can result in long-term health effects and has been associated with epigenetic changes, indicating a reduced tolerance for heat in those who have previously suffered from a heat-related illness.

Most chemical digestion and absorption of nutrients takes place in the _____.

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Final answer:

Most of the chemical digestion and nutrient absorption occurs in the small intestine, thanks to enzymes that break down food and villi that maximize nutrient absorption.

Explanation:

Most chemical digestion and absorption of nutrients takes place in the small intestine. The small intestine is where a majority of the digestion takes place because it has enzymes, such as lipases, proteases, and carbohydrates, that break down food into smaller molecules our bodies can use. In addition to this, the small intestine has a massive surface area due to the presence of villi and microvilli which maximize the absorption of nutrients.

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Which test should be performed for patient with suspected stroke within 25 minutes of arrival?

Answers

The answer is a neurologic assessment by the stroke team should be performed within 25 minutes of arrival. Neurologic assessment is the examination of sensory neuron and motor responses, especially reflexes, to know whether the nervous system is compromised. The following actions are undertaken:

-      Review the patient's history, including past medical history.

-      Perform a physical exam.

-      Begin last known well if not already done.

-      Execute a neurological exam to assess patient's status using the NIHSS or the Canadian Neurological Scale.

-       The CT scan should be accomplished within 25 minutes from the patient's arrival in the Emergency Depatment and should be read within 45 minutes.

The visual examination of the mucosal lining of the length of the large intestine is a

Answers

The visual examination is called a colonoscopy.

Study the figure below and predict which of the following components would best indicate the overall biotic health of an aquatic ecosystem?

A.) Particulate amounts
B.) Sedimentation rates
C.) Species abundance
D.) Water quality

Answers

According to the image above, I believe the answer would be D. Water Quality!
Hope this helps you out!
Thanks! :)

Why are scientists concerned about deforestation (the clearing of trees)? How is the conservation of habitats related to the work a taxonomist does?

Answers

Scientists have become concerned about deforestation due to its rapid increase in the last decade wherein more and more species are declining due to their habitat and food sources being destroyed. Taxonomists who study primarily in plant and animal groups are also concerned at how this will affect specific species of flora and fauna in effected areas.

Answer:

Scientists concerned about deforestation is discussed below.

Explanation:

The overabundance carbon is deposited in the factory, promoting it to develop. When trees are chopped down and roasted or permitted to disintegrate, their reserved carbon is discharged into the atmosphere as carbon dioxide. And this is how deforestation and woodland depravity subscribe to global warming.

name two processes that add to the genetic diversity of humans

Answers

I'm sure there are many processes that add to diversity, but the ones that stand out to me would be meosis, natural selection, mutation, random mating.
Natural selection, meiosis, random mating, and mutation

A nurse is providing community education regarding risk factors for ovarian cancer. identify five (5) risk factors associated with the development of ovarian cancer. (review the med surg rm)

Answers

These are the risk factors associated with the development of ovarian cancer:
1. Over 40 years of age.
2. First pregnancy after 30 years of age.
3. Family history of cancer.
4.High fat diets
5. Endometriosis.
6. History of heavy bleeding.
All these factors increase the probability of having the disease.

There are several risk factors associated with the development of ovarian cancer including genetic predisposition, reproductive history, age, endometriosis, and hormone therapy. Understanding and mitigating these risks can help reduce the likelihood of developing ovarian cancer.

Identifying risk factors for ovarian cancer is central to understanding how to reduce the chances of developing this disease. Here are five significant risk factors:

Genetic Predisposition: A family history of ovarian cancer or inherited genetic mutations, such as BRCA1 or BRCA2, can significantly increase the risk.Reproductive History: Women who have never been pregnant or had full-term pregnancies after 35 may have an increased risk.Age: The risk of ovarian cancer increases as women get older, with most cases occurring in women after menopause.Endometriosis: Having this condition can elevate the risk of developing ovarian cancer.Hormone Therapy: Long-term use of hormone replacement therapy, particularly estrogen alone, has been linked to a higher risk of ovarian cancer.
Reducing exposure to these factors, when possible, may lower the risk of developing ovarian cancer. For example, genetic counseling and testing for those with a strong family history can inform potential preventive measures. Other recommendations for prevention include maintaining a healthy diet and weight, considering the risks of hormone therapy, and discussing possible prophylactic surgeries with a healthcare provider if there is a significant genetic risk.

A CELL THAT HAS SUCCESSFULLY COMPLETED MEIOSIS HAS A CHROMOSOME NUMBER CALLED

Answers

Final answer:

A cell that has completed meiosis is called a haploid cell. This process begins with a diploid cell called a primary spermatocyte or oocyte that undergoes two rounds of cell division, producing four haploid cells known as spermatids in males and secondary oocytes in females.

Explanation:

A cell that has successfully completed meiosis, a type of cell division that reduces the chromosome number by half, is called a haploid cell. This process starts with a cell called a primary spermatocyte or oocyte, which is diploid, meaning it contains two sets of chromosomes. By the end of meiosis, this cell has undergone two rounds of cell division to produce four haploid cells, which each carry one set of chromosomes. These haploid cells are known as spermatids in males and secondary oocytes in females.

For example, an animal cell with a diploid number of four (2n = 4) proceeds through the stages of meiosis to form four haploid daughter cells. This is important in sexual reproduction, as the combination of haploid cells from two parents during fertilization results in offspring with a unique combination of genes.

If the cell continues through meiosis II after being fertilized, it forms all 46 chromosomes of a human being, half coming from the sperm. This indicates that humans are known as diploid organisms as our body cells (also known as somatic cells) contain two sets of chromosomes.

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What would happen to the egg white if a raw egg were placed in vinegar?

Answers

If you put a raw egg in vinegar the egg shell will disolve and will leave the whole inside rubbery. This happens from acetic acid. Acitic acid is used as a solven in rubber, plastic, it is the chief acid of vinegar

Whith regard to gender difference s in coping strategies, male is to female as fight or flight is to

Answers

With regards to gender differences in coping strategies, male is to female as fight or flight is to TEND AND BEFRIEND. Men and women have different strategies in coping with stress; men usually exhibit the fight or flight tendency while women exhibit the tend and befriend tendency.

PLEASE HELP!!! Which of the following is created when the sun pushes the ionized gases of a comet away from the central core?

Coma

Nucleus

Plasma tail  <-- my answer

Solar wind

Answers

The correct answer is C. Plasma Tail.

Answer:

Plasma tail

Explanation:

A comet is a body in space which revolves around Sun in elliptical orbit. It is composed of rocks, dust, ice and frozen gases. A comet has mainly three parts:

Nucleus- It is the core of the comet which is solid.

As the comet nears the sun, the frozen gases start sublimating. An atmosphere surrounds the nucleus which is known as coma.

As the comet approaches the sun closely, the coma extends backwards due to solar wind. The solar wind pushes the ionized gases of the comet away from the nucleus. This is known as tail. There are two tails - dust tail and  plasma tail. Plasma tail is composed of ionized gases -heavier than the dust tail and thus lies below it.

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